<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
    <style>
        .one{
            width: 400px;
            height: 400px;
            background-color: blue;
            overflow: hidden;
            
            
            }
            .two{
                width: 200px;
                height: 200px;
                background-color: yellow;
                margin-top: 100px;

            }
    </style>
</head>
<body>
    <div class="one"><div class="two"></div></div>
    
</body>
</html>